[bsdimp]

It's hard to reverse apply 'rm /usr/src/bin/ld.c' in the instructions to patch 160, for example. You have to reconstruct ld.c from 2.10.1BSD, and then add missing changes to get it to work...

[qubex]

Exactly: deletions is what came to my mind instantly and if you hadn’t raised the issue then I would have.